yihui.org

https://yihui.org· First analyzed 12 May 2026· Updated 12 May 2026

Export

yihui.org

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.21.87.33

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

albert.ns.cloudflare.com.kristin.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

371 ms10%

Speed Index

482 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

16 KB

11 requests

0–49

50–89

90–100

Architecture Stack

JAMstack

⚡ SSG

Frontend

Framework

Hugov0.148.2

Infrastructure

Hosting

Cloudflare

CDN

Cloudflare

Technology Stack

2 Technologies Detected

CSS Frameworks

Tailwind CSS

CDN

Cloudflare

SEO Analysis

D45/100

Meta Tags5/15

Content5/12

Headings0/8

Technical12/25

E-E-A-T0/7

Images4/7

Links5/5

URL5/5

Social2/5

Freshness0/4

Mobile4/4

Indexability3/3

yihui.orgyihui.org

Yihui Xie | 谢益辉

Personal website of Yihui Xie; 谢益辉的个人网站

Title Length15 chars

Recommended: 50-60 chars (~84px / 580px)

Description Length39 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag — every page should have exactly one H1

10 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

1,987 URLs

robots.txt

Local SEO

Local Search Readiness

3/100

Poor

1 14 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

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AI & LLM Readiness

F33/100

Bot Access

20/25

Machine Read.

5/25

Schema Data

0/25

Citation

8/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

blockquotesnav

Text ratio:25%

Words:168

Token eff.:Too Short

Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary139w

Descriptive Headings

Canonical URL

Open Graph1/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (9)

AI readiness recommendation preview...

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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

70/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

10/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

15/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

9/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

1/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

2 recommendations

•Accessibility recommendation preview...

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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

73/100

A+

2 mg

CO₂e / view

16.3 KB

Page Weight

95%

Cleaner Than

New Visitor

2 mg

Returning (cached)

<0.001 g

Annual (10K/mo)

204 g

Emission Segments

Data Center

<0.001 g

Network

<0.001 g

Device

1 mg

Resource Breakdown

JavaScript

524 B

Images

7.9 KB

CSS

5.1 KB

HTML

2.9 KB

Green Hosting Verified

Cloudflare

GWF Verified

2 recommendations

•Carbon footprint recommendation preview...

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Security Score

78%Good

Static / Informational

HTTPS

WAF

33d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

16.03.2026

Valid Until

14.06.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

yihui.org

SHA-256 Fingerprint

97:73:54:E6:4A:A3:FA:EA:23:9C:4E:62:D7:A8:47:DF:4F:BE:4D:8F...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

access-control-allow-origin

alt-svc

h3=":443"; ma=86400

cache-control

🟡 0s(public, max-age=0, must-revalidate)

cf-cache-status

DYNAMIC

cf-ray🇫🇷 Paris

9fa82cd0fde9d09a-CDG

content-encoding

⚡ Brotli(br)

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (5)

alt3.aspmx.l.google.com

alt4.aspmx.l.google.com

aspmx.l.google.com

alt2.aspmx.l.google.com

+1 more

Domain Information

yihui.org

Domain Age

8y 7m

Created

16.09.2017

Expires

16.09.2030

Last Updated

17.08.2021

Registrar

Cloudflare, Inc.

DNSSEC

Not Enabled

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

54/100

Mobile Friendly1 breakpoint

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

Viewport

width=device-width, initial-scale=1

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Palatino

WCAG AAA

71/100

Readability

/30

25/30

16px · LH 1.50

Hierarchy

/20

9/20

WCAG

/25

24/25

21:1 min contrast

Performance

/25

13/25

1 font · 3 req

Heading Font

Palatino

Body Font

Palatino

Serif16px

Contrast Ratio

21:1

WCAG AAA (≥7:1)

Reading Comfort

~35 CPL

Narrow lines

16px

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 21.0:1).

✅ Lean font stack: 1 font families keeps load times fast.

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

Buy on MyFontsFlesch 52

Color Palette

8 unique colors

3.92:1 AA Large Light

#ffffff

Background· 83.8%

#83807f

Other· 2.1%

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Scripts & Styles

6 Resources

Scripts

Styles

Async

Defer

Top Script Sources

cdn.jsdelivr.net(1)static.cloudflareinsights.com(1)

Website Identity

yihui.org

8 years old

Location detected: 🇨🇦 Canadavia ip

Cloudflare, Inc.📧 Google Workspaceen-US

Social Profiles

GitHub Mastodon

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Last analyzed: 12 May 2026 at 08:50

Historical Analysis & Change Tracking